The American and the Chinese will cross gloves on June 1 in the main event of Boxing Night in Riyadh, Saudi Arabia.
"I'm betting on Zhilei winning this fight. Wilder's time has passed. I like Zhang. Wilder has beaten some iconic fighters and he's got some tough training under his belt. It's time for him to retire. The two fights with Fury took a lot out of him. I saw that in the Joseph Parker fight. A lot of people thought he would overlook it. The fight showed me that it's time for Wilder to end," Khan said in an interview with YouTube channel Boxing News.
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